The correct answer is D. STUDENT.
STUDENT was an AI system developed by Daniel Bobrow to read and solve algebra word problems. It was one of the first AI systems to be able to understand and solve complex problems in a natural language.
SHRDLU was an AI system developed by Terry Winograd to understand natural language. It was able to understand simple commands and questions, but it could not solve algebra word problems.
SIMD was a parallel processing computer architecture developed by Seymour Cray. It was not an AI system.
BACON was an AI system developed by Stuart Russell to discover scientific laws. It was not able to read and solve algebra word problems.